Package Includes: You will get 6 pcs of tubeless tire valve stems, enough quantities for your daily demands. Size: The total length of our valve is 54mm, the bottom diameter is 17mm, and the hole diameter is 8mm. Please measure the size you need before buying. Material: Our tyre valve extension adaptors are made of high-quality aluminum alloy and natural rubber, which are sturdy and durable, anti-corrosion and rust-proof, and have a long service life. Application: Our tubeless tire valve stem is a very practical tire inflation accessory, suitable for most electric cars and motorcycles. Easy To Install: Our tyre valve extension adaptor is very simple to use and can be easily installed without special tools. Just remove the valve cap and screw on the tire valve. Colour: Black Size: Overall length 5.4cm, base 1.7cm Delivery quantity: 6 pieces Note: Other items are not included here, other pictures are just showing effect. Due to the difference between different monitors, the picture may not reflect the actual color of the item. The products are all measured manually, please allow errors, thank you